How it works

One creative thread from raw idea to test-ready package.

Thumbuild keeps the video promise, visual direction, edits, title pairings, and testing rationale connected across every iteration.

Bring the raw material

Describe the video, paste a script or link, upload footage, attach a frame, or begin from a blank canvas.

Included in the workspace

Turn the source into a compact brief: audience, payoff, curiosity gap, emotional tone, must-show elements, and constraints.

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Generate meaningfully different routes built around proof, stakes, transformation, comparison, authority, or curiosity.

Included in the workspace

Refine text, subjects, backgrounds, shapes, and effects directly or with a plain-language chat instruction.

Included in the workspace

Review mobile readability, hierarchy, subject prominence, relevance, originality, and policy safety with visible reasoning.

Included in the workspace

Pair three thumbnail hypotheses with complementary titles and package the files, notes, and rationale for publishing.

Included in the workspace